Perhaps you should try some spelling variations:
"modified coverage approximation algorithms" » "modified average approximation algorithms", "modified _verage approximation algorithms", "modified dfverage approximation algorithms", "modified orcaverage approximation algorithms"
"modified co solution algorithm" » "modified co evolution algorithm", "modified co convolution algorithms", "modified co evolutionary algorithm", "modified _ solution algorithm", "modified df solution algorithm", "modified orca solution algorithm", "modified nacl solution algorithm"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified coverage approximation algorithms") OR ("modified co solution algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified coverage approximation algorithms\") OR (\"modified co solution algorithm\"))*".
• Removing quotes may allow a broader search: (( modified coverage approximation algorithms ) OR ( modified co solution algorithm ))*.